Paul tosses a quarter off the Main Street bridge into the St. John’s River. The distance, in feet, the quarter is above the water is modeled by the equation
d( t ) = -12t^2 + 48t + 100, where t represents time in seconds.

Part A: From what height was the quarter tossed?

Part B: How long does it take the quarter to reach its maximum height?

Part C: What is the maximum height of the quarter?

Part D: How much time does it take for the quarter to hit the water?